eSlider
168a0a3b53
OQ3: internal/duckstats + bin/qa/stats.go. Zig stays Ladybug-only. mikefarah/yq for small structured slices. Gitea #30.
74 lines
1.6 KiB
Go
Executable File
74 lines
1.6 KiB
Go
Executable File
//usr/bin/env go run -tags=qa_stats "$0" "$@"; exit
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//go:build qa_stats
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//
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// bin/qa/stats.go - DuckDB quantiles over a JSON number array or JSONL count.
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//
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// ./bin/qa/stats.go <<< '[1,2,3,4,5]'
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// ./bin/qa/stats.go --jsonl rows.jsonl
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//
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// NOTE: never run `gofmt -w` on this file — it breaks the shebang.
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// DuckDB CGO needs gcc/g++ (not Zig). After eval "$(bin/cgo/zig env)":
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// CC=gcc CXX=g++ CGO_CFLAGS= CGO_LDFLAGS= ./bin/qa/stats.go
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package main
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import (
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"encoding/json"
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"fmt"
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"io"
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"os"
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"strings"
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"github.com/eSlider/2dph/internal/duckstats"
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)
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func main() {
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os.Exit(run(os.Args[1:]))
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}
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func run(args []string) int {
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jsonl := ""
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for i := 0; i < len(args); i++ {
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a := args[i]
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switch {
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case a == "--jsonl" && i+1 < len(args):
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i++
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jsonl = args[i]
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case strings.HasPrefix(a, "--jsonl="):
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jsonl = strings.TrimPrefix(a, "--jsonl=")
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case a == "-h" || a == "--help":
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fmt.Fprintln(os.Stderr, "bin/qa/stats.go [--jsonl FILE] # stdin = JSON [float,…]")
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return 0
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default:
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fmt.Fprintln(os.Stderr, "unknown arg:", a)
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return 2
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}
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}
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if jsonl != "" {
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n, err := duckstats.CountJSONL(jsonl)
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if err != nil {
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fmt.Fprintln(os.Stderr, err)
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return 1
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}
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fmt.Printf("n: %d\n", n)
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return 0
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}
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raw, err := io.ReadAll(os.Stdin)
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if err != nil {
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fmt.Fprintln(os.Stderr, err)
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return 1
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}
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var samples []float64
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if err := json.Unmarshal(raw, &samples); err != nil {
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fmt.Fprintln(os.Stderr, err)
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return 1
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}
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s, err := duckstats.Quantiles(samples)
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if err != nil {
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fmt.Fprintln(os.Stderr, err)
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return 1
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}
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fmt.Printf("n: %d\nmin: %g\np50: %g\np95: %g\nmax: %g\navg: %g\n",
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s.N, s.Min, s.P50, s.P95, s.Max, s.Avg)
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return 0
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}
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